BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JULY 31, 2004 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] PARTIAL SUNSHINE AND HUMID WITH INCREASING WINDS TODAY... Small to moderate cumulus have been moving swiftly to the northeast today under a canopy of thin cirrus. The air remains very humid with the dew point near 70 degrees. The wind has increased since sunrise out of the SSW and is now gusting to 35 mph. The chance for showers and thunderstorms will also increase into Sunday. July continues to average colder and wetter than normal. Roughly 2/3 of the monthly rainfall (3.22 of 4.86 inches) fell in 5 hours scattered through the month during the three heaviest rain events on 7/2, 7/5, and 7/24. Today's observations: 8 A.M. EDT Weather: Scattered stratocumulus under thin broken cirrus Temperature: 72F, Dewpoint: 71F, Wind: SSW 16 mph, Sea-level pressure: 30.15 inches, rising BHO SA 1155 10 SCT 250 -BKN 20 210/72/71/2014/015/ STFRA ALQDS HAZY/ 8/501 51007 10072 20070 11 A.M. EDT Weather: Scattered cumulus under thin overcast cirrus Temperature: 79F, Dew Point: 68F, Wind: SSW 21G29 mph Visibility: 35 miles BHO SA 1455 30 SCT 200 SCT 250 -OVC 35 200/79/68/2118G25/012/ PK WND 2129/38/ 8/201 56010 WEATHER SUMMARY FOR FRIDAY, JULY 30: TEMPERATURE (DEGREES F) MAX.....84 NORMAL.....81 ASOS.....84 AT 2:09 P.M. MIN.....65 NORMAL.....63 ASOS.....65 AT 4:23 A.M. MEAN....75 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL......+3 TOTAL DEPARTURE FOR THE MONTH.....-63 (-2.3 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........24 S AT 7:50 P.M. AEROVANE.........28 SSW AT 11:05 P.M. ASOS.............24 S AT 4:01 P.M. DAVIS............27 S AT 2:24 P.M. FASTEST MILE FOR YESTERDAY..........20 SSW AT 4:00 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......21 S AT 4:01 P.M. AVERAGE WIND SPEED AND DIRECTION..12.0 SSW ASOS...........12.4 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........4.86 DEPARTURE....+1.24 ASOS..............4.92* TOTAL PRECIPITATION FOR THE YEAR..........27.73 DEPARTURE....-1.56 ASOS.............26.18* *New ASOS weighing gage installed 6/24/04 replaced former tipping gage. PRELIMINARY CLIMATE SUMMARY FOR JULY 2004......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 7/1 82/62/72/+2/0.06/T/507/55 29 MPH S TSTM trace/sml hail 7/2 83/59/71/+1/0.93/T/575/63 45 MPH W TSTM trace of hail 7/3 80/59/70/0/0/892/98 21 MPH NNW 7/4 81/59/70/0/0/817/90 23 MPH SSE 7/5 69/63/66/-5/1.29/000/00 33 MPH S 7/6 79/65/72/+1/T/367/40 22 MPH NW 7/7 78/63/71/ 0/0/690/76 23 MPH SSE 7/8 75/62/69/-2/0.01/045/05/ 24 MPH S 7/9 75/62/69/-2/0/534/59 25 MPH S 7/10 80/59/70/-1/0/842/93 21 MPH NW 7/11 74/60/67/-5/0/713/79 20 MPH N 7/12 76/59/68/-4/0/189/21 24 MPH S 7/13 64/60/62/-10/0.27/000/00 28 MPH ENE 7/14 63/59/61/-11/0.51/000/00 27 MPH NNE 7/15 77/60/69/-3/0/000/00 29 MPH S AERO 33 MPH S 7/16 79/62/71/-1/0/395/44 30 MPH SW AERO 33 MPH SW 7/17 84/63/74/+2/0/600/67 23 MPH WSW 7/18 82/66/74/+2/T/751/84 22 MPH ESE 7/19 72/64/68/-4/0.13/9/01 22 MPH NNE 7/20 84/67/76/+4/0/587/66 22 MPH WSW 7/21 84/66/75/+3/0/728/82 16 MPH SE AERO 20 MPH SE 7/22 86/67/77/+5/0/700/79 24 MPH SSW 7/23 83/67/75/+3/0/389/44 28 MPH S 7/24 72/58/65/-8/1.45/000/00 30 MPH N AERO 34 MPH N 7/25 70/58/64/-9/T/326/37 21 MPH ENE 7/26 73/57/65/-7/0/615/70 21 MPH E 7/27 72/60/66/-6/0.05/254/29 18 MPH ENE 7/28 57/64/61/-11/0.16/000/00 25 MPH NNE 7/29 81/62/72/0/0/.../.. 17 MPH SW 7/30 84/65/75/+3/0/.../.. 24 MPH S 7/31 morning low 70.. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 31 HIGH 95F IN 1917 LOW 50F IN 1895,1918 PRECIP 1.34 INCHES IN 1892 PEAK GUST 43e MPH WNW IN 1953, 43 SW IN 1971 RECORDS FOR AUGUST 1 HIGH 97F IN 1917 LOW 49F IN 1891 PRECIP 3.61 INCHES IN 1927 PEAK GUST 41 MPH NNW IN 1985 TODAY'S REPORT BY: Mike Iacono